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[/] [or1k/] [trunk/] [linux/] [uClibc/] [ldso/] [ldso/] [i386/] [ld_sysdep.h] - Blame information for rev 1765

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/*
 * Various assmbly language/system dependent  hacks that are required
 * so that we can minimize the amount of platform specific code.
 */
 
/*
 * Define this if the system uses RELOCA.
 */
#undef ELF_USES_RELOCA
 
/*
 * Get a pointer to the argv array.  On many platforms this can be just
 * the address if the first argument, on other platforms we need to
 * do something a little more subtle here.
 */
#define GET_ARGV(ARGVP, ARGS) ARGVP = ((unsigned long*) & ARGS)
 
/*
 * Initialization sequence for a GOT.
 */
#define INIT_GOT(GOT_BASE,MODULE)                               \
do {                                                            \
  GOT_BASE[2] = (unsigned long) _dl_linux_resolve;              \
  GOT_BASE[1] = (unsigned long) MODULE;                         \
} while(0)
 
/*
 * Here is a macro to perform a relocation.  This is only used when
 * bootstrapping the dynamic loader.  RELP is the relocation that we
 * are performing, REL is the pointer to the address we are relocating.
 * SYMBOL is the symbol involved in the relocation, and LOAD is the
 * load address.
 */
#define PERFORM_BOOTSTRAP_RELOC(RELP,REL,SYMBOL,LOAD,SYMTAB)    \
        switch(ELF32_R_TYPE((RELP)->r_info)){                   \
        case R_386_32:                                          \
          *REL += SYMBOL;                                       \
          break;                                                \
        case R_386_PC32:                                        \
          *REL += SYMBOL - (unsigned long) REL;                 \
          break;                                                \
        case R_386_GLOB_DAT:                                    \
        case R_386_JMP_SLOT:                                    \
          *REL = SYMBOL;                                        \
          break;                                                \
        case R_386_RELATIVE:                                    \
          *REL += (unsigned long) LOAD;                         \
          break;                                                \
        default:                                                \
          _dl_exit(1);                                          \
        }
 
 
/*
 * Transfer control to the user's application, once the dynamic loader
 * is done.  This routine has to exit the current function, then
 * call the _dl_elf_main function.
 */
#define START()                                                 \
        __asm__ volatile ("leave\n\t"                           \
                    "jmp *%%eax\n\t"                            \
                    : "=a" (status) :   "a" (_dl_elf_main))
 
 
 
/* Here we define the magic numbers that this dynamic loader should accept */
 
#define MAGIC1 EM_386
#undef  MAGIC2
/* Used for error messages */
#define ELF_TARGET "386"
 
struct elf_resolve;
extern unsigned long _dl_linux_resolver(struct elf_resolve * tpnt, int reloc_entry);
 
#define do_rem(result, n, base)  result = (n % base)
 
/* 4096 bytes alignment */
#define PAGE_ALIGN 0xfffff000
#define ADDR_ALIGN 0xfff
#define OFFS_ALIGN 0x7ffff000

Line No.	Rev	Author	Line
1	1325	phoenix	`/*`
2			`* Various assmbly language/system dependent hacks that are required`
3			`* so that we can minimize the amount of platform specific code.`
4			`*/`
5
6			`/*`
7			`* Define this if the system uses RELOCA.`
8			`*/`
9			`#undef ELF_USES_RELOCA`
10
11			`/*`
12			`* Get a pointer to the argv array. On many platforms this can be just`
13			`* the address if the first argument, on other platforms we need to`
14			`* do something a little more subtle here.`
15			`*/`
16			`#define GET_ARGV(ARGVP, ARGS) ARGVP = ((unsigned long*) & ARGS)`
17
18			`/*`
19			`* Initialization sequence for a GOT.`
20			`*/`
21			`#define INIT_GOT(GOT_BASE,MODULE) \`
22			`do { \`
23			`GOT_BASE[2] = (unsigned long) _dl_linux_resolve; \`
24			`GOT_BASE[1] = (unsigned long) MODULE; \`
25			`} while(0)`
26
27			`/*`
28			`* Here is a macro to perform a relocation. This is only used when`
29			`* bootstrapping the dynamic loader. RELP is the relocation that we`
30			`* are performing, REL is the pointer to the address we are relocating.`
31			`* SYMBOL is the symbol involved in the relocation, and LOAD is the`
32			`* load address.`
33			`*/`
34			`#define PERFORM_BOOTSTRAP_RELOC(RELP,REL,SYMBOL,LOAD,SYMTAB) \`
35			`switch(ELF32_R_TYPE((RELP)->r_info)){ \`
36			`case R_386_32: \`
37			`*REL += SYMBOL; \`
38			`break; \`
39			`case R_386_PC32: \`
40			`*REL += SYMBOL - (unsigned long) REL; \`
41			`break; \`
42			`case R_386_GLOB_DAT: \`
43			`case R_386_JMP_SLOT: \`
44			`*REL = SYMBOL; \`
45			`break; \`
46			`case R_386_RELATIVE: \`
47			`*REL += (unsigned long) LOAD; \`
48			`break; \`
49			`default: \`
50			`_dl_exit(1); \`
51			`}`
52
53
54			`/*`
55			`* Transfer control to the user's application, once the dynamic loader`
56			`* is done. This routine has to exit the current function, then`
57			`* call the _dl_elf_main function.`
58			`*/`
59			`#define START() \`
60			`__asm__ volatile ("leave\n\t" \`
61			`"jmp *%%eax\n\t" \`
62			`: "=a" (status) : "a" (_dl_elf_main))`
63
64
65
66			`/* Here we define the magic numbers that this dynamic loader should accept */`
67
68			`#define MAGIC1 EM_386`
69			`#undef MAGIC2`
70			`/* Used for error messages */`
71			`#define ELF_TARGET "386"`
72
73			`struct elf_resolve;`
74			`extern unsigned long _dl_linux_resolver(struct elf_resolve * tpnt, int reloc_entry);`
75
76			`#define do_rem(result, n, base) result = (n % base)`
77
78			`/* 4096 bytes alignment */`
79			`#define PAGE_ALIGN 0xfffff000`
80			`#define ADDR_ALIGN 0xfff`
81			`#define OFFS_ALIGN 0x7ffff000`

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[/] [or1k/] [trunk/] [linux/] [uClibc/] [ldso/] [ldso/] [i386/] [ld_sysdep.h] - Blame information for rev 1765